Signal for pressure-gages.



No: 860,163. PATENTED JULY 16, 1907.. J. B. TOWNSEND.

SIGNAL FOR PRESSURE GAGES.

APPLICATION FILED JAN. 29, 1907.

2 SHBETSSHEET 1,

WITHESSE= .INVENTOR PATENTED JULY 16, 190? J. B. TOWNSEND. SIGNAL EOE PRESSURE GAGES.

APPLIGATION FILED JAN. 29. 1907.

2 SHEETSSHEBT Z.

WITNESSES! PATENT orrren.

UNITED STATES,

. JOHN B. TOWNSEND, or WELLronn, WEST vIReINIA.

SIGNAL FOB PRESSURE-GAGES.

' ford, county of Kanawha, and'State of West Virginia,

have invented certain newand' useful Improvements in Signals for Pressure-Gages, of which the following is a specification. p My invention relates to new and useful .improve-j ments in signals for pressure gages, andmore particularly to an alarm signal for that class of gages employed for indicating the pressure of steam, gas, water,"or the like; and itconsists in the particular construction, arrangement and combination of parts which will here matter be fully described. V I 1 The object of the invention is to provide a simple, inexpensive and eflicientmeans whereby a.- predetermined maximum or minimum pressure reeordedby. a

gage may he announced for directing the attention of anattendantthereto. I f

In describing the invention in detail, reference is herein had to the accompanying.drawings, forming a.

' part of this specification, in which Figure 1 is a face view, partially broken, of an ordinary pressure-gage, showing my invention applied thereto; Fig. 2 is a vertical section of the same; Fig. 3

is a face view of the gage with the dial and its correlated parts removed, showing the recess 0r slot in the side of the casing and the interior mechanism of an ordinary gage; and Fig. 4 is a plairview of the under side of the dial.

Referring to said drawings, in which like referencenu ncrals designate like parts throughout the several v-iews-1 indicates the glass face of the gage, which. latter may be of any preferred type of construction, having the hand or indicator 2 ordinarily employed in connection therewith for indicating the pressure.

Connected by screws 3 to the dial 4 on the under side thereof and spaced and held away therefrom by washers 5 is a cross-plate 6. Said dial is secured as ordinarily by screws 7 to the supporting posts 8. Within a central circular aperture in the dial 4 is a disk 9 having an integral hollow spindle 10 revolubly mounted in said cross-plate 6. Said disk has integral therewith-a circular upright rim 11 having oppositely disposed notches 12 therein inwhich the indi ator lies normallyj'out of contact with the side-edges of the notches. Said disk is connected through its spindle 10, the cross-plate 6, a binding-post 13 mounted in said plate, and a conducting wire 14 leading through the casing 'wall 15 to one pole of a battery 16 or other source of electrical energy. The other pole of the battery is connected by a. conducting wire 17 to the signal, which may be a lamp or a bell 18, the latter be- 3 shown in the drawings, which signal is indirectly .gdnnrxrted by a wire 19 to the indicator 2. The conncction of the wire 19 with the indicator may he made Specification of Letters Patent. Application filed January 2 9,1 90'7. Serial No. 354,620.

'of variation of pressure admitted before the alarm i Batented July 16, 1907.

in any suitable manner, but is preferably made through I the interior mechanism, or works, of the gage, the

mechanism so involved in the present instance'cmnprising the post ZOfplate 21 and the post 22 upon which said indicator is mounted, said mechanism being of an ordinary type. I p

As a means for adjusting the disk 9, a bar 23 is pivotally attached at 24 to the under side of the dial, and said bar 23 carries a revolublc disk 25, preferably of leather or having a. peripheral leather band 26 thero about, which normally lies in frictional engagementwith said disk 9. Said disk lies at one side within or protrudes from a recess or slot-like opening 27 in the casing wall 15 in convenient position to be rotated by hand. In adjusting the position 'of the disk 9 the disk 25 is pressed inward into 'frictional contact with the disk 9 and is then rotated, rotating said disk 9.

As is obvious, the disk 9 is adjusted with. its scrrar tions or notches underlying the indicator in such position that the latter is free to rotate within a certain range. When either of the predetermined pressures for which the disk is adjusted are indicated, the indt cator contacts with. the side edges defining the notches, closing the electric circuit to the sighal lamp or hell, as the case may be, giving the alarm. The amount given may be regulated by the width of the notchc 12 provided in the rim or flange 11.

The disk 9 being freely rotatable, does not interfere with the movement of the indicator, the former-being carried around with the latter after contact is made mechanism is-,eliminated.'

1 have deseiwilied ny invention in what I consider to be its simplest form, but it is obvious that various changes within the scope of the appended claims may be resorted to without departing from the general spirit or scope of the invention. Hence I do not desire. to limit myself to the precise construction and arrangement of parts herein shown and described.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a device of the character described. the combination with a pressure-gage having a dial-and a movable indicator, of a rotatable disk supported centrally under said indicator, said disk being provided with oppositely disposed notches in which said indicalorslnnds. the edges defining said nofcln-s being in llnpnlli M movenwnt o1- said indicator, an electric circuit one pubof which is connected to said indicator and (he opp sile p le to said disk. and a signal in said circuit and npemhw! by the closing thereof.

in a device or lhc chnrucler des ribed. the combination with n pressure-nauthaving a movable indicnlor. of a rotatable disk supported under said indicator. a pi ripheral flange .ma-n b said disk and having notches therein, said disk being ndaplml for adjustment to brin:

said notches under said indicator, szzhl nolcbes being adapted lo admil of free movement of said indicator la .therewi'th. Consequently, danger of deranging the. v

l\\'('l'll prmlelvrminml points, up cIm-lr'n circuit one mhor which is connected to'said indicator and the opposite pole to said member. and a signal in said circuit and operated by the closingof 'the latter Ii. In a device of the character described. the combination with a pressure-gage haying a movable indicator, of an adjustable flanged disk mounted under the indicator and normally out of contact therewith. said disk haying oppositely disposed notches in its flange, and being adapted for adjustment with said notches underlying said indicator to admit of a certain range of undisturbed movement in the latter and to be contacted at predetermined points in its iilHi/t int, an electric circuit between said indicator and said dis); which is adapted to be closed by their contact. and a :na] in said circuit.

4. in a (lo we of the character described. the combination with a pressure-gage having a movable indicator, of a flanged disk revolubly mounted beneath said indicator. said disk having a notch or scrration in its flange in which said indicator is adapted to freely more and with 2210 sidcarltcs of which said indicator is adapted to contact. an cle tric circuit established by such contact, and a mi in said circuit.

.1 la a eignai for pressure-gages, the combination with a cane having a centrally apertnred dial and a movable indicator. of a crossplatc carried by said dial on its under side. a disk revoiuhly mounted in said cross-.nlate and rev olnbly held in the central aperture olf't he' dial, a pcriphcral flange carried by said disk. notches provided in said flange. said'disk being adapted for adjustment to bring said notches under said indicator. which notches admit of the free movement of said indicator between certain predeterminedpoints for which sa d disk is adjusted. said indicator being adapted to contact with the deiining ec ges ot said notches at said predetermined points in its movement. an electric circuit one pole of which is connected to said indicator and the other to said disk. a

signal in said circuit, said'signal being actuated by the closing of the circnit 2stabli shed through said contact, and a second revolnble disk in frictional contact with the ii tmentioned disk whereby the latter may be rotated, said second disk )rotruding through a slot in the gage casing.

in testimony whereof i allix my signature in presence of two snbecrihing witnesses.

JOIIN B. TOWNSEND.

Witnesses D. C. Tuner, I it. UGLi'Ji'iCi-l. 

